Don't worry about price so much. If someone is willing to trade you some sats for a failing fiat currency, make the trade. And if you can find someone willing to offer you more sats for the same amount of fiat, take that trade instead.
The more sats you get now, the more wealth you have later. Price goes up, get some sats, price goes down, get more sats. The only reason to ever sell is if you think you can make even more sats than you already have or you're trading sats for something you need to survive or enjoy your life.
Sats are the goal and the fiat price is just one way to achieve that goal. Get as many as you possibly can.